抑制OFDM信号峰均比的优化脉冲整形

为了进一步降低正交频分复用系统中高的峰均比。通过分析基于脉冲整形抑制峰均比的正交频分复用系统模型，提出一种选择最优奈奎斯特脉冲的方法．该方法在保证系统误码率性能不受影响的条件下，可以根据具体应用调节系统峰均比抑制性能，调节参数为整形脉冲的滚降因子，使改进的奈奎斯特脉冲整形技术具有更强的适应性和实用性．仿真结果表明：优化的脉冲整形技术能够明显提高峰均比抑制性能，同时保证系统的误码率最小；通过选择合适的滚降因子，峰均比可接近单载波信号且保持系统误码率不变．

Optimal pulse shaping for peak-to-average power ratio reduction of OFDM signal

In order to reduce the high peak-to-average power ratio(PAPR) of orthogonal frequency division multiplexing(OFDM) signal,the theoretical model of PS-based OFDM system was analyzed.A method to get an optimal Nyquist pulse which can improve the PAPR performance by adjusting the rolling-factor according to the practical application was proposed.The proposed pulse-shaping technique was more adaptable and practical than traditional work,without increasing the bit error rate(BER) of original system.The simulation results show that the novel Nyquist pulse shaping technique can significantly improve the PAPR performance with BER,and the PAPR of PS-OFDM can reach to the level of single carrier with an optimal constant BER by choosing an appropriate rolling factor.